Shuttle for sewing-machines.



L. E. JOHNSON & E. ERIOKSON. SHUTTLE FOR SEWING MACHINES. APPLIQAIION FILED MAR. 28, 1914.

Patented Ma 23. 1915.

JFK.

25 ii A a 12 7 LmElMm I l! ,snurrjns roe 'snwme-naonmns.

tawnnncn n. :ronnson, or wrnrnnonzennnnwenn ERICKSON, or LYNN, MASSA-- enusnr'rs, essienons' To Women snon MACHINERY c emits, a CORPORATION or ,massacnusn'r'rs. 1

I orr bn Application filed March as, 191a. Serial No. 828,400.

To azz whom. it may concern I Be it known thatwe, LAWRENCE E. JOHN- soN, a citizen of the United States of Amer ica and a resident of Winthrop, in the county of Sufiolk and State of Massachusetts, and EDWARD ERICKSON, a subject of the :King of Sweden, and a resident of I Lynn-,in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Shuttles for Sewingachines, of which the'following is a specification.

' This invention relates-toimprovements in shuttles for-sewing machines and particularly thatclass "of machines in which the outer soles 'of shoes are sewed to the welt. L

,iIt has forvi ts object the production of a shuttle whichv willbegreatly simplified in construction While its operation" will be 7 greatly improved.

.The invention consists in certain novel elevation of one face of the shuttle. Fig.

3' represents an elevation'of the opposite face thereofl view of said shuttle; Fig. 5 represents a section through. the shuttle. .Fig. '6 represents a sectional detail of the shuttle. the.

cutting plane being on line 6-6 on Fig. 3.

-Fig. 7 represents a sectional detail of the shuttle, the cutting plane being on line 7-7 tit) on Fig. 3, and Fig; 8 represents an elevation of a portion of the driving member showing the shuttle coacting lug.

shuttle substantially circular witha portion of its periphery cut away as at 11 to form a depression adapted to receive the proiecting lug 12 of the driving member 13.

The driving member 13 is provided with an axially disposed cylindrical shank 14 mounted in a bearing 15 in the frame 16 of a' sewing machine and its opposite end has secured thereto a pinion 17 the teeth of which mesh with the teeth ofa segment 18 on the end of a lever 19 to which an oscillatory "movement is, imparted at predetermuch freedom.

Fig. 4 represents an edgemachine, thereby causing the shuttle case or-shell 10 to be oscillated. The peripheral wall of "said shuttle. case 10 is provided with aproje cting bead or flange 20 disposed in'a groove 21 in the frame of themachine, this groove; 21 forming a racewayfor the shuttle case and the bead 20 disposed there: 1n preventing any lateral displacement of said shuttle. v

The driving mechanism herein shown and describedforms no part ofthe present in- :vention'and is only, illustrated for convene ience'indescribing the operation of theshut- .tle. The inner face of said shuttle case 10,

viz.," thatjface adjacent to the driving member 13, 1s provided with an annular recess '22, "the anis of which is parallel with and eccentricto the axis ofthe-said shuttle case. In the-annular recess22 is positioned the bobbin or spool 23 carrying the shuttle thread wh ch, passes from said bobbin-23 through'a. radial passage 24 inthe peripheral wall of o.', or os'ron, MAssAoHu Specification of Letters Patent. Patented Mar. 23, 1915. I

mine d times during the. operation of the the shuttle case. vAs the ,thread passes .thr'oughthe opening 24 a friction isycreated thereon by the spring pressed ball 25 which prevents the thread paying. out with too The thread extends from the opening 24.to an opening 26 in the shell -10 of the shuttle. said thread passing along a groove 27 in the face of the shell so that it is protected from anv'cha'fin-q thereon during the oscillation of the shuttle. From the o ening 26 the thread passes through'an eve 28 in a member 29 pivoted at 30 to the shell 10. This pivoted member 29 is adapted to ing pin 31, thereby permitting the removal In the drawings, 10 is the shell of the or insertion of the bobbin-23. The member 29 not only positions the bobbin but being ,ofyielding material creates sufficient fric-' tion onv the bobbin to prevent it from spinnine. 4

The locking pin 31 is mounted in a cham- I her in the shuttle shell and its outward extension engages with a notch in the edge of the member 29. The ,chamber=32 isclosed 24 and closed by'a threaded plug 36 between which and the ball 25 is interposed a helical spring 37 the tension of which. may be regulated by the adjustment of said plug 86. The rounded face of the ball 25 bears on the thread as. it passes from the bobbin and creates a friction thereon, but owing to its smooth rounded surface no injury to the thread can occur.

The ball 25 is free to revolve in its-seat in-the end of the spring 37.

The opening 26 extendingthrough the -shuttle case 10 fromface to face is cen trally disposed in the hub 38 on which the bobbin 23 is mounted and about the axis 0 which it is free to turn.

The shuttle case 10 is provided with aloop engaging point 39 extending beyond the outer face thereof'and having a later having a radial passagein said case throughhaving a -radial'passage in said case throu which the thread from said bobbin is fed,

and an elongated chamber perpendicular to said passage and parallel to the axis of said bobbin, and a spring pressed friction memher in said chamber adaptedto press on said thread against the outer wallof said passage as it passes therethrough.

2; A shuttle case contaimng a bobbin and which the thread'from said bobbin is fed,

and a spring pressed revoluble ball adapted to press on said thread as it passes through said passage. 3. A shuttle case PIOVlClGd with an annular recess inone face and having a radial passagein the peripheral wall communicatingwith said recess and an elongated chamabout its pivot.

sa-151 I 'with said passage; a bobbin in said recess carrying thread adapted to pass therefrom through said periphera1 passage; and a revoluble spring pressed friction member. in said chamber adapted to press said thread against the outer wall of said passage as it passes therethrough. I

4;. A shuttle case provided with anannular recess in one face and having a radial passage in the peripheral wall communicating with said recess; a bobbin in said recess, carrying .thread adapted to pass therefrom through said passage; and a revoluble member adapted to press on said thread as it passes through said passage.

5;; A shuttle case provided with an annular recess in one face; a bobbin therein; a bobbin retaining member pivoted to said case and provided with a notch in one edge;

and a .spring pressed locking devicecoacting with the said notch normally adapted to prevent movement of said retaining member 6. A shuttle case having a bobbin contain- I ing recess in one face thereof and provided witha central cylindrical bearing hub for said bobbin, said hub having a centrally disposed"hol e extending through its. entire length for the passage of the thread from said bobbin; a bobbin retaining member pivotally secured to the inner face of the shuttle havinga perforation therein opposite the hole in said hub and through which the bobbin thread is adapted to pass and provided with a notch in one edge; and yielding m'eans coacting'with said notch for positioning said retaining member.

. Signed by us at Boston, Mass, this 26th day of March, 1914. v LAVRENCE E. JOHNSON.

EDlVARD ERICKSON. 'lVitnesses NATHAN C. 'Loarnano, \VALTER E. LOMBARD. 

